I ended up getting a box truck and needed the extra room,
Making my own cap because I couldn't find a used fiberglass one.
Made the frame out of old bed frame angle iron,
With some wood screwed to it it help hold the galvanized sheet, and interior walls.
Galvanized sheet is from broken washing machines. Those things are gold for free sheet metal.
Need two more washing machines and it'll be all buttoned up.
Tried to go as aerodynamic as I could in the time I have and balancing the extra storage/sleeping room I require.
It's better than a big flat wall, so I'm happy.
Sliced my hand today on that sheet, bled like crazy.
But yeah, figured I'd post.